<template>
    <div class = "app-container">
        讲师添加
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
      <!-- 头衔缩略图 -->
      <pan-thumb :image="avatar"/>
      <!-- 文件上传按钮 -->
      <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
      </el-button>
      <!-- 
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 -->
      <image-cropper
         v-show="imagecropperShow"
         :width="300"
         :height="300"
         :key="imagecropperKey"
         :url="BASE_API+'/eduoss/fileoss'"
         field="file"
         @close="close"
         @crop-upload-success="cropSuccess"/>
       </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
</div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components:{ ImageCropper,PanThumb},
    data(){
        return{
            teacher:{
                name:'',
                sort: 0,
                level: 1,
                career: '',
                intro: '',
            },
            avatar: '',
            //上传弹框组件是否显示
            imagecropperShow: false,
            imagecropperKey: 0,//上传组件Key的值
            BASE_API:process.env.BASE_API,//获取dev.env.js里面地址
            
            saveBtnDisabled: false // 保存按钮是否禁用,
        }
    },

    created(){//页面渲染之前执行
      this.init()
    },

    watch:{//监听
       $route(to,from){//路由变化方式,路由发生变化，方法就会执行
         this.init()
       }
    },
    methods:{ 
      close(){//关闭上传弹框的方法
         this.imagecropperShow = false
         //上传组件初始化
         this.imagecropperkey = this.imagecropperkey+1
      },
      //上传成功方法
      cropSuccess(data){
        this.imagecropperShow = false
        //上传之后接口返回图片地址
        this.avatar = data.url
        this.imagecropperkey = this.imagecropperkey+1
      },
      init(){
        //判断路径是否有id值
      if(this.$route.params && this.$route.params.id){
        //从路径获取id值
        const id = this.$route.params.id
        //调用根据id查询的方法
        this.getInfo(id)
      }else{//路径没有id值，做添加
         //清空表单
         this.teacher = {}
      }
     },
      //根据讲师id查询的方法
      getInfo(id){
        teacherApi.getTeacherInfo(id)
            .then(response =>{
               this.teacher = response.data.teacher
            })
      },
        saveOrUpdate(){
          //判断是修改还是添加
          //根据teacher是否有id
          if(!this.teacher.id){
            //添加
            this.saveTeacher()
          }else{
            //修改
            this.updateTeacher()
          }
        },
        
        //修改讲师的方法
        updateTeacher(){
          teacherApi.updateTeacherInfo(this.teacher)
            .then(response =>{
              //提示信息
              this.$message({
                type: 'success',
                message: '修改成功！'
              });
              //回到列表页面 路由跳转
              this.$router.push({path:'/teacher/table'})
            })
        },

        //添加讲师的方法
        saveTeacher(){
            teacherApi.addTeacher(this.teacher)
                .then(response =>{//添加成功
                   //提示信息
                   this.$message({
                       type:'success',
                       message:'添加成功!'
                   });
                   //回到列表页面，路由跳转
                   this.$router.push({ path: '/teacher/table' })
                })
        }
    }
}
</script>